On the ability of IEEE 802.11p and STDMA to provide predictable channel access
Paper in proceedings, 2009

Emerging traffic safety applications requiring low delay communications will need vehicle ad-hoc networks. The only communication standard currently supporting this is IEEE 802.11p. However, 802.11p uses the medium access method CSMA/CA, which has a major drawback: unbounded worst case channel access delay. We therefore propose an algorithm already in commercial use in the shipping industry: STDMA. With STDMA, nodes always get predictable channel access regardless of the number of competing nodes and the maximum delay is deterministic. In this paper we elaborated with different parameter settings for the two protocols with the aim of improving performance without altering the standards.

vehicular communications

MAC

STDMA

IEEE 802.11p

V2V

Author

Katrin Bilstrup

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Elisabeth Uhlemann

Volvo Group

Halmstad University

Erik Ström

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Urban Bilstrup

Halmstad University

16th World Congress on Intelligent Transport Systems and Services, ITS 2009; Stockholm; Sweden; 21 September 2009 through 25 September 2009

Subject Categories

Telecommunications

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11/26/2018